From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail6.bemta7.messagelabs.com (mail6.bemta7.messagelabs.com [216.82.255.55]) by kanga.kvack.org (Postfix) with ESMTP id 3E9E66B016A for ; Thu, 1 Sep 2011 21:17:22 -0400 (EDT) Date: Fri, 2 Sep 2011 03:17:16 +0200 From: Andi Kleen Subject: Re: [PATCH] thp: tail page refcounting fix #5 Message-ID: <20110902011716.GE7761@one.firstfloor.org> References: <20110826062436.GA5847@google.com> <20110826161048.GE23870@redhat.com> <20110826185430.GA2854@redhat.com> <20110827094152.GA16402@google.com> <20110827173421.GA2967@redhat.com> <20110901152417.GF10779@redhat.com> <20110901162808.80a2117c.akpm@linux-foundation.org> <20110901234527.GD7761@one.firstfloor.org> <20110902002013.GJ10779@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20110902002013.GJ10779@redhat.com> Sender: owner-linux-mm@kvack.org List-ID: To: Andrea Arcangeli Cc: Andi Kleen , Andrew Morton , Minchan Kim , Michel Lespinasse , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Hugh Dickins , Johannes Weiner , Rik van Riel , Mel Gorman , KOSAKI Motohiro , Shaohua Li , "Paul E. McKenney" > Calling get_page/put_pages more times than necessary is never ideal, I > imagine the biggest cost is the atomic_inc on the head page that I've actually seen it in profile logs, but I hadn't realized it was redundant. Have to see if it brings a benefit to hot users. -Andi -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org